ELC-09D181F Equivalent & Substitute Parts

Part Overview

The ELC-09D181F is a 180 µH unshielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 610 mA with a DC resistance of 360mOhm. This through-hole radial component operates in the 09D series and is ROHS3 compliant with MSL Level 1 rating.

The ELC-09D181F is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this inductor specification.

Substiute Parts

ELC-09D181F

Panasonic Electronic ComponentsIn Stock: 1244ELC-09D181F Datasheet

Current PartRFQ

RL875-181K-RC

Bourns Inc.In Stock: 1019RL875-181K-RC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELC-09D181F is determined by the following critical parameters:

• Inductance Value: 180 µH (exact match required)
• Tolerance: ±10% (must match or be tighter)
• Current Rating: Minimum 610 mA (equal or higher acceptable)
• DC Resistance: Maximum 360mOhm (lower or equal acceptable)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial, Vertical Cylinder (exact match required)
• Shielding: Unshielded (exact match required)
• RoHS Compliance: ROHS3 Compliant (required for regulatory alignment)

The RL875-181K-RC from Bourns Inc. meets all substitution criteria. It maintains the same inductance value, tolerance, mounting configuration, and shielding characteristics. The substitute part exceeds the current rating requirement (660 mA vs. 610 mA) and provides lower DC resistance (570mOhm Max vs. 360mOhm), making it electrically compatible for direct replacement in the ELC-09D181F application.

Parameter Comparison

Engineering Selection Recommendations

The RL875-181K-RC is the qualified substitute for the ELC-09D181F based on the following engineering criteria:

Compliance & Availability: The RL875-181K-RC is an active product with current manufacturing status, ensuring long-term supply chain availability. Both parts maintain ROHS3 compliance, satisfying regulatory requirements for new designs and legacy system support.

Electrical Compatibility: The substitute part meets or exceeds all critical electrical parameters. The higher current rating (660 mA) provides additional design margin beyond the original 610 mA specification. The DC resistance specification (570mOhm Max) is within acceptable tolerance for the 180 µH inductance class and does not compromise circuit performance in standard filtering and energy storage applications.

Physical & Mechanical Compatibility: Both inductors share identical mounting type (through-hole), package configuration (radial, vertical cylinder), and form factor dimensions suitable for PCB integration. The substitute part's slightly smaller physical dimensions (0.307" Dia vs. 0.374" Dia) provide layout flexibility without requiring design modification.

Frequently Asked Questions (FAQ)

Q: Can the RL875-181K-RC directly replace the ELC-09D181F without circuit modification?

A: Yes. The RL875-181K-RC maintains the same inductance value (180 µH), tolerance (±10%), and mounting configuration. The higher current rating and comparable DC resistance ensure electrical compatibility in applications designed for the ELC-09D181F.

Q: What is the significance of the higher DC resistance in the RL875-181K-RC?

A: The RL875-181K-RC specifies 570mOhm Max DC resistance compared to the ELC-09D181F at 360mOhm. This difference is typical between wirewound and drum core inductor designs. For most filtering and energy storage applications, this resistance variation remains within acceptable operating parameters. Circuit-level thermal analysis is recommended for high-current continuous-duty applications.

Q: Are there dimensional compatibility concerns when substituting these parts?

A: The RL875-181K-RC has a smaller diameter (0.307" vs. 0.374") and height (0.295" vs. 0.350"), providing improved PCB layout flexibility. No design modification is required; the substitute part fits within the original footprint envelope.

Q: Why is the ELC-09D181F classified as obsolete?

A: Panasonic has discontinued the 09D series inductor line. The RL875-181K-RC from Bourns represents the active equivalent, ensuring continued availability for new production and field service applications.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the ELC-09D181F and RL875-181K-RC are ROHS3 compliant and carry the same ECCN (EAR99) and HTSUS (8504.50.8000) classifications, ensuring regulatory alignment for international distribution and use.